<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头部区域  -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!--登录表单区域 -->
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="iconfont icon-user"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          >
          </el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginForm: {
        username: 'admin',
        password: '123456',
      },
      // 验证表单
      loginFormRules: {
        //验证账号
        username: [
          { required: true, message: '请输入账号', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
        //验证账号
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          {
            min: 3,
            max: 15,
            message: '长度在 3 到 15 个字符',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  methods: {
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        //全局挂载了axios 可以通过$http发送请求  this.loginForm获取表单数据
        // const results = await this.$http.post("login",this.loginForm)
        //  console.log(results) //输出Promise 可以添加 await  async简化他
        //data 是返回的真实数据
        const { data: res } = await this.$http.post('login', this.loginForm)
        // console.log(res)

        //$message是element.js挂载的弹窗组件 可选值有error失败 success成功 等等
        if (res.meta.status !== 200)
          return this.$message.error('登录失败----用户名或密码错误')
        this.$message.success('登录成功')

        //1.将登录成功之后的token 保存到客户端的sessionStorage中
        // 1.1将项目中出了登录之外的其他api接口必须要在登录之后才能访问
        // 1.2token 只应在当前网站打开期间生效 所以将token 保存在sessionStorage中
        window.sessionStorage.setItem('token', res.data.token)
        // 2.通过编译试导航跳转到后台主页,路由地址是/home
        this.$router.push('/home')
      })
    },
  },
}
</script>

<style lang="less" scoped>
// 页面大盒子
.login_container {
  background-color: #2b4b6b;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
}

// 表单大盒子
.login_box {
  height: 300px;
  width: 450px;
  background-color: #fff;
  display: flex;
  justify-content: center;
  flex-direction: column;
}

//头部区域
.avatar_box {
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  box-shadow: 0 0 10px #ddd;
  background-color: #fff;
  margin: -100px auto 0 auto;

  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
  }
}

// 表单区域
.login_form {
  display: flex;
  width: 100%;
  flex-direction: column;
  margin-top: 50px;
  padding: 0 20px;
  box-sizing: border-box;

  .btns {
    display: flex;
    justify-content: flex-end;
  }
}
</style>
